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              <p>Enter some text in the field below, then press the "Test" button to test for a <a href="https://en.wikipedia.org/wiki/Palindrome" target="_blank">palindrome</a>.</p>

<form id="myForm">
  Text to Test:
  <input type="text" name="myString">
  <br /><span id="result" style="color:red"></span>
  <br />
  <input type="button" onclick="myFunction()" value="Test">
              function myFunction() {
  var strToTest = document.getElementById("myForm").elements["myString"].value,
    firstHalf, secondHalf, reversed;
  reversed = strToTest.split('').reverse().join('');
  firstHalf = strToTest.substring(0, strToTest.length / 2);
  secondHalf = reversed.substring(0, strToTest.length / 2);
  console.log('strToTest = ' + strToTest);
  console.log('firstHalf = ' + firstHalf);
  console.log('secondHalf = ' + secondHalf);
  console.log('reversed = ' + reversed);
  if (strToTest == "") {
    document.getElementById("result").innerHTML = "Please enter some text to test.";
  } else if (firstHalf == secondHalf) {
    document.getElementById("result").innerHTML = "Yes! It's a palindrome!";
  } else {
    document.getElementById("result").innerHTML = "Sorry, that's not a palindrome.";
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